net: mctp: Don't access ifa_index when missing (Linux Linux)

CVE-2025-38006
MEDIUM 5.5

At a glance

Source
NVD
EPSS
EPSS 0.20 % · percentile 9 ()
State
PUBLISHED
Published
Updated
Assigner
Linux
NVD status
Modified

Description

In the Linux kernel, the following vulnerability has been resolved: net: mctp: Don't access ifa_index when missing In mctp_dump_addrinfo, ifa_index can be used to filter interfaces, but only when the struct ifaddrmsg is provided. Otherwise it will be comparing to uninitialised memory - reproducible in the syzkaller case from dhcpd, or busybox "ip addr show". The kernel MCTP implementation has always filtered by ifa_index, so existing userspace programs expecting to dump MCTP addresses must already be passing a valid ifa_index value (either 0 or a real index). BUG: KMSAN: uninit-value in mctp_dump_addrinfo+0x208/0xac0 net/mctp/device.c:128 mctp_dump_addrinfo+0x208/0xac0 net/mctp/device.c:128 rtnl_dump_all+0x3ec/0x5b0 net/core/rtnetlink.c:4380 rtnl_dumpit+0xd5/0x2f0 net/core/rtnetlink.c:6824 netlink_dump+0x97b/0x1690 net/netlink/af_netlink.c:2309

Weaknesses (CWE)

  • CWE-908 — Use of Uninitialized Resource

References

Scores

VersionScoreVectorScored by
CVSS 3.1MEDIUM 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HNVD · nvd@nist.gov (Primary)

European references

CERT-FR advisories

Affected configurations (NVD CPE)

Affected products

ProductVersions
Linux · Linuxaffected 583be982d93479ea3d85091b0fd0b01201ede87d < 8ef7b3f0db69e2f4a80be351f6aee9a4c2332ef9 ; affected 583be982d93479ea3d85091b0fd0b01201ede87d < d22efcd246a7688599eefcf8e5c7985a3854ef5d ; affected 583be982d93479ea3d85091b0fd0b01201ede87d < acab78ae12c7fefb4f3bfe22e00770a5faa42724 ; affected 583be982d93479ea3d85091b0fd0b01201ede87d < d4d1561d17eb72908e4489c0900d96e0484fac20 ; affected 583be982d93479ea3d85091b0fd0b01201ede87d < 24fa213dffa470166ec014f979f36c6ff44afb45 ; affected 583be982d93479ea3d85091b0fd0b01201ede87d < f11cf946c0a92c560a890d68e4775723353599e1
Linux · Linuxaffected 5.15 ; unaffected 0 < 5.15 ; unaffected 5.15.203 ≤ 5.15.* ; unaffected 6.1.191 ≤ 6.1.* ; unaffected 6.6.92 ≤ 6.6.* ; unaffected 6.12.30 ≤ 6.12.*

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD